Chain delivery apparatus for tworevolution printing presses



CHAIN DELIVERY APPARATUS FOR TWO-REVOLUTION PRINTING PRESSES Filed Aug. 22, 1955 B. C. J. ALM

Aug. 22, 1961 2 Sheets-Sheet 1 BRUNO C. J. ALM

'ITORNEY5 g 22, 1961 B. c. J. ALM 2,996,982

CHAIN DELIVERY APPARATUS FOR TWO-REVOLUTION PRINTING PRESSES Filed Aug. 22, 1955 2 Sheets-Sheet 2 INVENTOR BRUNO c. J. ALM

idteg It Filed Aug. 22, 1955, Ser. No. 529,690 Claims. (Cl. 101-227) Unite This invention relates to chain delivery apparatus for two-revolution printing presses.

An object of this invention is to provide two-revolution printing presses with delivery and cutting mechanism which will deliver the sheets, after being printed, from the impression cylinder to the press to the pile and to cut the sheet into two parts during such transport.

In the accompanying drawings which illustrate an exemplary embodiment of the invention.

FIGURE 1 is a side view of the cutting and delivery mechanism with one side of the frame of the chain deliverer removed and the cutting mechanism omitted in the interest of clarity and parts of the press represented diagrammatically.

FIGURE 1a is a perspective View of the sheet cutting mechanism illustrating its location in the plane of the center lines of the chains.

FIGURE 2 is a transverse cross-sectional View on the line IIII of FIG. 1, both sides of the chain delivery frame being shown and part of the cutting mechanism omitted.

FIGURE 3 is an enlarged side sectional view of the sheet carriage and grippers and their immediate operating means.

FIGURE 4 is an enlarged side view of the sheet grippers represented in open position for receiving a sheet to be gripped.

FIGURE 5 is an enlarged side view partly in crossseotion of the means for driving the chain delivery apparatus from the printing press associated therewith.

FIGURE 6 is an enlarged plan view of mechanism for cutting the printed sheets through the cutting mechanism.

FIGURE 7 is a side View partly in cross-section on the section line VIIVII of FIG. 6.

FIGURE 8 is a side view partly in cross-section on the section line VIII-VIII of FIG. 6.

In the machine frame having built-in guide rails 2, a shaft 4 is supported in bearings 5 arranged in said frame. To this shaft 4 are attached chain wheels 3 as well as an outer gear wheel 6 and an inner gear wheel 6a. A cam 7 formed by the inner face of a laterally extending flange on a disc 7a arranged on shaft 4 is held in position by means of arm 8 which in turn is guided by an eccentric pin 9. Between the chain wheel 3 and an idler chain wheel 10, which also is ro-tatably mounted in the frame 1, by means of bearings the chains 11 run with their straight parts or flights guided by the rails 2 formed in the frame. On the side of the frame, but outside the idler chain wheels 10, is arranged a cam 12.

In the guide rails 2, a carriage 13 (FIG. 1) propelled along by the chains 11, is guided. The carriage consists of connecting pieces 14 and 15 one attached to either end of a tube '16 extending transversely of the machine. A tube 17 parallel with tube 16 is arranged so as to be movable in the connecting pieces 14, 15 and carries at one end an arm .18, on which roller 19 is rotatably mounted. To the fixed transverse tube 16 gripper stops 20 are attached and guided by a key 21. The gripper stops 20 carry movable, spring-loaded grippers 22, pivotally connected thereto at 20a and intermediate grippers 23. For controlling grippers 22, an arm 24 is arranged on tube 17. To the outer connecting pieces 14, 15 carriers 25 provided with guide grooves are attached, with which cubes 26 are engaged. These cubes are directly carried by a pin 27 which is part of the chain. The carriers 25 are guided atent U 2,996,982 Patented Aug. 22, 1961 by rollers 28 which engage in the guide rail 2. The sheet engaging surfaces of grippers 22, 23, when drawing the sheets forwardly between the pair of chains 11 are located in a plane passing through the center lines of the chains, one of these center lines being diagrammatically represented at Illa in FIG. 3.

The motion of the delivery chains and their connection to the press is effected by means of a gear wheel 29, FIG. 5, arranged on the cylinder journal 46 of the press, and which is in mesh with the gear wheel 6 on shaft 4. The gear wheel 6a attached to this shaft is in mesh with a gear wheel 31 on a shaft 32, extending transversely between the side walls of the machine frame 1, and supporting the guide rollers 40, 42, and 43 of the cutting mechanism. Numeral '33, FIGS. 7 and 8 designates an arm, which at one end turnable around a pivot 35 fitted in a holder 36 on a transverse shaft 37 extending between the side walls of the printing press, and at the other end carries a rotatable draw-roller 34. The latter is pressed against guide roller 40 by means of a springloaded strap 38, but can be raised from contact with the guide roller 41 which is guided laterally by the two guide rollers '42 and 43, FIG. 7. The location of the portions of the peripheries of the guide rollers 34 and 40 and of supporting rollers 42 and 43 and cutter 34, is precisely in the plane of the center lines of chains 11, so that the cutting takes place in said plane.

The chain delivery mechanism operates as follows:

The sheet printed on the impression cylinder 46 of the press is taken over by the carriage, 13 in FIGS. 1 and 3 of the chain deliverer in the position shown in broken lines to the left of FIG. 4 of the gripper part of the carriage. The principle for the method of operation of the impression cylinder when printing, which is known in itself, with the impression cylinder moving up and down while rotating, involves timed changes in the position of the impression cylinder in relation to the fixed shaft 4 of the chain delivery mechanism; Such a position is shown in FIG. 4 where the sheet is just being taken over by the carriage, based on the assumption that the cylinder grippers (not shown) holding the sheet during printing have just opened.

The intermediate gripper 23 is pressing against the top side of the sheet, keeping it in position on the cylinder until gripper 22 is ready to close, when control of the sheet is entirely taken over by the gripper carriage 13.

The opening movement of the gripper 22 is controlled by the inwardly facing cam 7 which turns the system, 19, 18, 17, and 24, counterclockwise, while arm 24 acts upon the gripper 22 and opens same. Simultaneously the spring-governed intermediate gripper 23 is opened under the influence of spring 44, the movement of which is limited by contact of the upper backwardly bent tongue with the gripper stop 20. After the gripper carriage has taken over the sheet, it is taken by the carriage in the direction indicated by arrow in FIG. 7.

Cutting of the paper is effected in the following manner: Drawing rollers 34 and cutting roller 4l1 are in contact with the respective guide rollers 40, '42, and 43, the peripheral speed of which is exactly the same as that of the gripper carriage and the paper sheet. The guide rollers transmit their rotary motion to the cutting and drawing rollers respectively. When the sheet is moving in the direction of the arrow, FIG. 7, the front edge of the sheet slides in between the cutting roller 41 and the guide rollers 42 and 43, FIG. 8, which thus divide the sheet into two parts. The purpose of the drawing rollers 34 is to eliminate vibrations across the direction of motion, and therefore they are provided with an outer rubber ring 34a. During continued transport of the paper sheet, roller 19 of the gripper carriage 13 comes into contact with cam 12, FIG. 1 whereupon the gripper 22, will open and the paper sheet will be released. A rotating suction roller (not shown in the drawing) provides a braking action on the sheet during this operation, and then places it correctly on the pile 45 shown in FIG. 1.

I claim: 1 a

1. In deliver apparatus for two-revolution printing presses having a rotating impression cylinder, an endless conveyor having its receiving end immediately adjacent said cylinder and comprising -a pair of chains spaced apart horizontally, chain drive means, positive drive means connecting said impression cylinder with said chain drive means, driving said chains in precisely timed relation to said cylinder, said chains having sheet grippers thereon for moving printed sheets in their longitudinal direction from the impression cylinder of the printing press, said grippers having sheet-engaging surfaces lying in the plane passing through the center lines of said chains while drawing said sheets through the delivery apparatus, sheet cutting discs located between said chains and arranged as a cooperating pair one above the other, with cutting parts of said discs lying in a plane passing through the center lines of said chains so that cutting of the sheet leaving the impression cylinder is effected in said plane in which plane the sheets are guided by said chain grippers, said cutting discs being located close to the receiving end of said conveyor, and proximate said impression cylinder so as to cut the leading parts of the sheets while the rear parts are still carried and guided by said impression cylinder.

2. Apparatus according to claim 1, and in which said cutting discs are located at the center line of the sheets cut thereby and between said pair of chains, a gripper carriage carried by said chains, rollers for guiding the sheets while being cut by said cutting discs, and means 4 for driving said guide rollers synchronously with the movement of said gripper carriage.

3. Apparatus according to claim 1 and in which said cutting discs are located at the center line of the sheets cut thereby and between said pair of chains, a gripper carriage carried by said chains, rollers for guiding the sheets while being cut by said cutting discs, and means for driving said guide rollers synchronously with the movement of said gripper carriage, said printing press having a cylindrical journal, and a transmission gearing drivingly connecting said guide rollers of said cutting means with said impression cylinder.

4. Apparatus according to claim 1 and in which guide rollers are provided for the printed sheets adjacent said cutting discs and means is provided for adjusting the positions of said guide rollers laterally to avoid engaging against printed portions of the sheets.

5. .Apparatus according to claim 1 and driving means for the lower one of said cutting discs connected with said conveyor drive means to be driven thereby, and arm and spring means for pressing the upper of said discs against the lower one thereof.

References Cited in the file of this patent UNITED STATES PATENTS 588,283 Meisel Aug. 17, 1897 1,820,142 Johnstone Aug. 25, 1931 2,305,536 Langston Dec. 15, 1942 2,506,445 Donning May 2, 1950 2,620,033 Wood Dec. 2, 1952 2,684,117 Wood July 20, 1954 2,685,926 Broden Aug. 10, 1954 2,730,364 Thornsen Jan. 10, 1956 

